Abstract
Purpose
To study the effects of GnRH antagonist (ganirelix-Orgalutran®) on the endometrium of regularly menstruating women.
Materials and methods
Prospective, self-controlled study. The thirty-five volunteers were studied for two cycles: one as a control and the other, GnRH antagonist-treated cycles in which ganirelix 0.25 mg/d was given daily for 3 days, starting when the largest follicle reached 15 mm. In both cycles, serum estradiol, LH and endometrial thickness were measured when the largest follicle was ≥18 mm. Endometrial biopsy was performed on day 6 after ovulation for histological dating and morphometric study.
Results
No statistical differences between histological dating and the endometrial thickness in the control and GnRH antagonist-treated cycles. All morphometric parameters were also not different. Serum estradiol and LH levels were significantly lower in GnRH antagonist-treated cycles.
Conclusion
GnRH antagonist has no effect on the endometrium of regularly menstruating women as assessed by either histological dating or morphometric analysis.
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Acknowledgements
We would like to thank Mettanando Bhikkhu for editing this manuscript. We are very grateful to Surasith Chaithongwongwatthana, M.D. for his useful advice on statistical analysis and Sarunya Numto, B.Sc. for her assistance in processing the endometrial specimens. This study would not have been possible without the generous cooperation of all volunteers who participated in this study. This study is supported by the Ratchadapiseksompotch Fund, Faculty of Medicine, Chulalongkorn University. Grant number: RA 178/47.
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Capsule The endometrium of regularly menstruating volunteers on day 6 post ovulation after receiving GnRH antagonist were not different from the endometrium of natural cycle.
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Sirayapiwat, P., Suwajanakorn, S., Triratanachat, S. et al. The effects of GnRH antagonist on the endometrium of normally menstruating women. J Assist Reprod Genet 24, 579–586 (2007). https://doi.org/10.1007/s10815-007-9184-z
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DOI: https://doi.org/10.1007/s10815-007-9184-z